At the current stage "Suggested bid" offers a range to help you decide on what you want to bid for the campaign.
The values provide a range that would guarantee your campaign a place in rotation at the time the suggestion was made. This means that if you bid within that range you will get as much traffic for your target as is currently possible on the network.
Having said that, if you bid below the suggested range, it doesn't mean that your ads won't be served at all. It only means that other campaigns will have preference over yours. However, if their demand is lower than the total available inventory for the target audience, campaigns with lower bids eventually will get served too.